Thanks for the reply. the problem would apper to be in the control box. It has a lock out lever which stop you going straight in to reverse from forward it also controls the warm up lever. We currently have a non function warm up lever. It a small plastic part which wears the only place I can find o...

90 HP 2 stoke outboard
When put into reverse it goes into gear and prop can be seen turning but the RPM stays at idle and won,t increase. It just moves the boat very slowly. Forward gear is fine and boat with run up to 40 MPH